Mercurial > dive4elements > river

annotate gwt-client/src/main/java/org/dive4elements/river/client/server/DischargeInfoServiceImpl.java @ 9801:1d7a72a50183 3.2.x tip

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Assume Compose V2, consistently
author Tom Gottfried <tom@intevation.de>
date Thu, 23 Nov 2023 10:14:13 +0100
parents 0a5239a1e46e
children
rev   line source
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.client.server;
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10
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11 import java.util.ArrayList;
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12 import java.util.List;
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13
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14 import org.w3c.dom.Document;
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15 import org.w3c.dom.Element;
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16 import org.w3c.dom.NodeList;
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17
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18 import org.apache.logging.log4j.Logger;
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19 import org.apache.logging.log4j.LogManager;
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20
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21 import com.google.gwt.user.server.rpc.RemoteServiceServlet;
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22
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23 import org.dive4elements.artifacts.common.ArtifactNamespaceContext;
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24 import org.dive4elements.artifacts.common.utils.XMLUtils;
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25
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26 import org.dive4elements.artifacts.httpclient.exceptions.ConnectionException;
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27 import org.dive4elements.artifacts.httpclient.http.HttpClient;
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28 import org.dive4elements.artifacts.httpclient.http.HttpClientImpl;
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29
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30 import org.dive4elements.river.client.shared.exceptions.ServerException;
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31 import org.dive4elements.river.client.client.services.DischargeInfoService;
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32 import org.dive4elements.river.client.shared.model.DischargeInfoObject;
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33 import org.dive4elements.river.client.shared.model.DischargeInfoObjectImpl;
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34
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35
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36 /**
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37 * @author <a href="mailto:raimund.renkert@intevation.de">Raimund Renkert</a>
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38 */
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39 public class DischargeInfoServiceImpl
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40 extends RemoteServiceServlet
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41 implements DischargeInfoService
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42 {
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43 private static final Logger log =
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44 LogManager.getLogger(DischargeInfoServiceImpl.class);
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45
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46 public static final String ERROR_NO_DISCHARGEINFO_FOUND =
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47 "error_no_dischargeinfo_found";
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48
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49 public static final String XPATH_DISTANCES = "art:discharges/art:discharge";
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50
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51
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52 @Override
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53 public DischargeInfoObject[] getDischargeInfo(
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54 String locale,
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55 long gauge,
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56 String river)
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57 throws ServerException
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58 {
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59 log.info("DichargeInfoServiceImpl.getDischargeInfo");
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60
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61 String url = getServletContext().getInitParameter("server-url");
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62
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63 Document doc = XMLUtils.newDocument();
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64
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65 XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator(
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66 doc,
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67 ArtifactNamespaceContext.NAMESPACE_URI,
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68 ArtifactNamespaceContext.NAMESPACE_PREFIX);
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69
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70 Element gaugeEl = ec.create("gauge");
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71 gaugeEl.setTextContent(String.valueOf(gauge));
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72
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73 Element riverEl = ec.create("river");
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74 riverEl.setTextContent(river);
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75
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76 gaugeEl.appendChild(riverEl);
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77 doc.appendChild(gaugeEl);
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78
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79 HttpClient client = new HttpClientImpl(url, locale);
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80
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81 try {
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82 Document result = client.callService(url, "dischargeinfo", doc);
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83
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84 log.debug("Extract discharge info objects now.");
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85 DischargeInfoObject[] objects = extractDischargeInfoObjects(result);
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86
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87 if (objects != null && objects.length > 0) {
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88 return objects;
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89 }
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90 }
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91 catch (ConnectionException ce) {
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92 log.error(ce, ce);
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93 }
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94
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95 throw new ServerException(ERROR_NO_DISCHARGEINFO_FOUND);
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96 }
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97
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98 protected DischargeInfoObject[] extractDischargeInfoObjects(
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99 Document result
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100 )
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101 throws ServerException {
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102 NodeList list = result.getElementsByTagName("discharge");
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103
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104 if (list == null || list.getLength() == 0) {
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105 log.warn("No discharge info found.");
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106 throw new ServerException(ERROR_NO_DISCHARGEINFO_FOUND);
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107 }
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108
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109 int num = list.getLength();
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110 log.debug("Response contains " + num + " objects.");
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111
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112 List<DischargeInfoObject> objects =
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113 new ArrayList<DischargeInfoObject>(num);
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114
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115 for (int i = 0; i < num; i++) {
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116 DischargeInfoObject obj = buildDischargeInfoObject(
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117 (Element)list.item(i));
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118
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119 if (obj != null) {
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120 objects.add(obj);
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121 }
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122 }
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123
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124 log.debug("Retrieved " + objects.size() + " discharges.");
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125
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126 return (DischargeInfoObject[])
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127 objects.toArray(new DischargeInfoObject[num]);
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128
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129 }
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130
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131 protected DischargeInfoObject buildDischargeInfoObject(Element node) {
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132
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133 String desc = node.getAttribute("description").trim();
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134 String start = node.getAttribute("start").trim();
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135 String end = node.getAttribute("end").trim();
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136 String bfgId = node.getAttribute("bfg-id").trim();
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137
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138 if (start.length() > 0 && end.length() > 0) {
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139 try {
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140 Integer startYear = Integer.valueOf(start);
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141 Integer endYear = Integer.valueOf(end);
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142 return new DischargeInfoObjectImpl(
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143 desc, startYear, endYear, bfgId);
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144 }
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145 catch (NumberFormatException nfe) {
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146 log.warn(nfe.getLocalizedMessage());
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147 }
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148 }
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149
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150 log.warn("Invalid distance info object found.");
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151
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152 return null;
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153 }
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154 }
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155 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org